Electrical engineering

Analysis of typical faults in the real grid of 22 kV Roha town feeder (India)

The fault analysis and evaluation of fault voltage and current in the power system network is very important for a stable and reliable operation of the power system. In the present paper, a study of various reasons for faults in a real ...  read more

Some features and opportunities for calibration of analyzers of electric power by total harmonic distortion

The possibility for evaluation of the quality of electrical energy for the purpose of calibration of analyzers is considered by using a periodic square-wave pulse signal instead of the traditionally used harmonic signals. The square-wave ...  read more

Hysteresis loss analysis of magnetic materials with data acquisition system

Magnetic materials are widespread in many fields of the electronics and electrical engineering. The most of them take place in the constructions of transformers, coil cores, electromagnets, measurement sensors etc. Thus, their parameters ...  read more

Optimization of the structure and the distribution of the reactive power compensation in the industrial electrical supply systems

The compensation of the reactive loads is fundamental for improving the quality of the industrial electrical supply and decreasing the losses of active power in the distribution grids. Regarding energy efficiency, capacitor banks are ...  read more

Study of the uncertainty measuring of the detonation velocity in a waveguide of non-electric blasting system

The block-diagram of equipment for measuring the velocity of detonation in non-electrical waveguides for blasting is developed. Calibrated time intervals between two pulses corresponding to the specified distance between the two photo ...  read more

Development and application of induction and resistive electrical heating systems for industrial pipelines

This paper examines problems of calculation of heating units for ferromagnetic steel in weak electromagnetic fields. Such installations are low-temperature induction heating installations. In these plants, the electromagnetic field ...  read more

Network voltage distortion by arc furnace and its mitigation

Electric arc furnace (EAF) is the most dangerous type of load for power systems. It causes different kinds of distortion due to its frequently variable character. Nowadays there are different types of arc furnaces. This article is devoted ...  read more

A model of a single-phase synchronous generator with rare earth magnets

This paper makes a study of a single-phase synchronous 16-pole generator with axial magnetic field and rare earth magnets. A model of the synchronous generator has first been developed, taking into consideration its geometric dimensions, ...  read more

A study on glare in a sports lighting environment using LED lighting and diffusion plates

Illumination sources have been rapidly shifting in recent years to light-emitting diodes (LED), which are capable of producing more than 10,000 cd/m2 at maximum luminance. This light intensity is far greater than conventional ...  read more

Experimental study of the contact resistance of crossed cylindrical reinforcing steel bars

In the paper experimental results for the contact resistance between two cross-pressed cylindrical bars of reinforcing steel bars are presented. The diameters of the investigated samples were from 6 to 10 mm. At a DC measurement current ...  read more